You can extend a house in West Ealing, though rarely without asking first. Two dozen listed buildings stand in and around it. Ten conservation areas fall within its wider surroundings. All of it is built on clay that shrinks and swells. Getting an extension through here is a process, and the clay adds to the foundation bill.
Historic England lists 26 buildings in and around West Ealing. None is Grade I, three are Grade II* and 23 are Grade II. Listing covers the inside of a building as well as the outside, so on a listed home even a replacement window or a moved wall needs listed building consent from Ealing Council on top of any planning permission. Twenty-six is small against the size of the district, but anyone whose house is one of them will hear from the council about most changes.
Ten conservation areas fall within the wider area around West Ealing, including Brentham Garden Estate and Grange and White Ledges. Inside a conservation area the council takes a close interest in anything visible from the street, and some work that would be routine elsewhere needs permission. Ealing Council's conservation area maps show whether a particular house is inside one. Check while the purchase can still change, because a boundary can run between two streets that look identical.
Across West Ealing, 1,101 planning applications were made between April 2024 and June 2026, and 468 in the most recent twelve months. That is a lot of neighbours who have decided the loft was wasted space or the back kitchen too small. People here alter their homes all the time, and the forms are part of doing it.
The British Geological Survey puts the whole of West Ealing in Class 3 for shrink-swell ground, the published hazard class for clay that expands when wet and contracts when dry. All of the area reaches that class. For an extension this means deeper foundations and a structural engineer's view on the soil and on any nearby trees, so the clay adds to the bill without stopping the project. The market gardens and orchards that once covered this ground grew well on it, and a new rear extension has to cope with the same soil moving through the seasons.
One listed building in the area is on Historic England's Heritage at Risk register, meaning it is in poor enough condition to need attention. Its repair may qualify for grant support and will be watched closely. For anyone buying an ordinary terrace nearby, it's a neighbour with paperwork, and it doesn't put their own house at risk.
In practice, a house outside a conservation area and off the listed register may be able to do some rear and loft work under permitted development, the national rules that allow certain changes without a full application. Inside a conservation area those rights narrow, and on a listed building almost everything needs consent. Most of West Ealing's homes are flats, which work under tighter rules than houses, so the owner of a converted Edwardian flat should expect to apply where a house owner might not need to.
West Ealing gives you less freedom to change your home than most of London's suburbs. Conservation areas, listed buildings and clay all add steps, and anyone planning a big extension should expect forms, fees and an engineer before any work begins.